Clamping device for molds



' 192 v v Oct 7 c. J. E. MAXWELL CLAMPING DEVICE FOR MQLDS 2 Sheets-Sheet 1 INVENTOR couu J: E.MAXWELL.

Filed April 22,. 1927 Oct. 18, 1927.

1,645,609 c. J.E. MAXWELL CLAMPING DEVICE FOR MOLDS Filed April 19.27

2 Sheets-Sheet 2 INVENTOR COLIN J1E.MAXWELL.

ATTYs.

mike,

Patented Oct. 18, 1927.

NZIETED S TEZS 1,645,609 PATENT ()F'FI-E'C'E.

norm JOHN. EDWARD MAXWELL, or: MONTREAL. QUEBEC, CANADA, ASSIGNOB. To

qnmramieozeanr one. Jenni LIMIIED, or MONTREAL, CANADA. i

cLAMrmerEvIonroR MOLDS.

This invention relates to. improvements in clamping: devices: for molds: such as are used? for holding together molds which are- 5 tion. It consists essentially of the improved:

construction hereinafter described in detail: in the accompanying specifications and drawings. I

In the drawings:

Figure- 1 is a perspective view showing an.

embodiment of 'theinvention applied toxtlie tightening of aflexible member: about rectangular mold members.

Figure 2 is asectional'. plan showing: the deviceapplied to anbctagOnal mold member. Figure 3-' is a perspective detaili of an anchor member.

Figure 4- is a sectional detailthrough one of the corner members;

Figure 5 is a perspective View off the tighteningwedge.

F gure,

tightening-bar adapted for-usein connection;

with the device as hereinafter explained.

In the drawings like characters of reference indicate corresponding parts in all of the figures.

Referring to the drawings, A mdlcates a flexible tightening member such as a chain, which is designed to extend around or through corner members B placed about the corner of adjacent mold members C In Figure 1 these mold members are designed to mold a column which is rectangular in cross section, whereas in Figure 2 the column is rectangular in cross section. In the latter case auxiliary or filling blocks D may be provided which will enable the corner blocks to be fitted into position in the same Way as shown in Figure 1, the corners being formed in this case by the auxiliary blocks D.

' In each instance, between the corner blocks and the mold members bars or strips 10 of wood or the like may be inserted. T e general arrangement of the corner blacks 6 is a perspective viewyof as Application fi1ed Apri122, I927}. Serial No. 185 8931 with the'' flexible tightening member as shown does not form part of-' the present ine vention, which is directed more-particularly to the anchor member and the looking or tightening means therefor hereinafter described.

Each of-the corner members B3 of which three are shown in the drawing, is of 'theconstruction shown in detail in Figure lnof the drawing;, comprisingarms- 1.1 and -12 hav ing their inner faces extending at right angles to.- eacha-other and having ribs 18. on their outer faces, the ribs on opposite sides being; connected by a crossbar 14-, between; which and: the outside corner of'themeeting bars 11 and 12 an eye 15is formed, through: which the flexible member A ispassed.

' The: fourth. corner member is of" special? construction and. constitutes an anchormem ber Ev of 'the formshown in detail ingF-igure 3. It is providediwith arms -16Iand=17 whose inner faces extend at right angles to each other and! whose outer faces: are formed. at; the edges With outwardly extending. ribs 18: The member lz8 has'an eyelet or eye 19Jattachedfthereto or formed integral therewith. Also; a fulcrum member 2Oisprovided adja-e cent to: the corner for I a purpose hereinaften described; i

Cooperating with the anchor member E issai wedge memberF ofthe-formi shown in) Fiigure fi'g litis-providedwith. a firm: por-: tion 2% having a 'centrali slot 22* th-roughi which the chain may be inserted and an outwardly extending lug 23 having a ring or eye 24 attached thereto and which forms a connection between the lug and the end of the flexible member A.

G indicates a locking plate formed with a central key-h0le slot 25 through which the flexible member A extends.

In using the device the corner blocks B and the anchor block E are located at the corners of the mold to be held together as shown in Figures 1 and 2. The flexible member A is drawn about the corner members and tightened conveniently by means of a bar H, of the type shown in Figure 6, the bar being placed against the fulcrum member 20 during the tightening operation. lVhen the chain A has been tightened to the I desired extent the locking member G is en gaged with a link of the chain. the keyhole slot being of a size to permit the entire chain to pass through the portion while individual links will be locked in the narrow portion. The wedge F is then inserted between member G and anchor block E, the bar H is removed and a blow is struck with a hammer or any convenient device on the wedge member F which places a substantial strain on the chain, thereby holding all the parts together. 7

It will be observed that the device is composed of very few parts, and each part is a unit in itself. The device may be tightened with the use of a single bar operating on the fulcrum which is integral with the anchor member E. All of the parts are held together by the chain or flexible member. The outer corners of the member B are rounded in order to avoid accidental dislodgment of the same.

Great strength is the result of the simplicity described in, the preceding paragraph; as will be noted in'the design of the corner pieces and of the tightening and holding devices, which are in the very simplest forms. lVhile the flexible tightening unit passing through all the corner blocks except the main corner block to which latter it is attached at one end, is shown in the drawings as a chain, obviously a rope or a piece of cable or other like flexible member, or either with a short section of chainattached to the loose end for fastening, or short rigid cross pieces at the loose endof the rope or cable for fastening, may serve the same purpose.

As many changes could be made in the above construction and many apparently widely different embodiments of my inven tion, within the scope of the claims, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.

which the locking member is in the form of a plate having a key-hole slot therein.

3. The device as claimed in claim 1 in which the wedge member is attached to the flexible member.

4. The device as claimed in claim 1 in which the wedge member is formed with a central slot through which the flexible member extends.

5. The device as claimed in claim 1 in which the anchor member has a fulcrum formed thereon.

6. A; device of the character described comprising in combination a flexible tightening member, an anchor member connected at one end to the same having arms adapted to extend about the corner of a mold, a plurality of corner members connected to the flexible member, a locking member having a locking slot through which the flexible member extends, and a tightening wedge adapted to extend between the anchor member and the locking member.

7. The device as claimed in claim 6 in which the wedge member is attached to the flexible member.

8 The device as claimed in claim 6 in which the anchor member has a fulcrum formed thereon.

In witness whereof I have hereunto set in hand.

C LlN- JOHN EDWARD MAXlVELL. 

